27
Sprinkler system
In Austria the system may legally be operated without a
sprinkler system. Connection of a sprinkler system is at the
discretion of the operator or else is subject to the locally
applicable regulations.
The fire extinguishing system cannot be installed until the
boiler and boiler-mounted hopper positions have been
adjusted.
Installation of the sprinkler system:
1. Connect a cold water supply pipe that cannot be turned
off through the rear hopper insulation to the 3/4" sprinkler
pipe connection (7) via a temperature-relief valve (95°C)
to be provided on site.
2. Insert the temperature sensor for the temperature-relief
valve in the sensor socket (8) below the auger casing
and make sure it is making good contact/firmly seated.
Temperature-relief valves that are used as sprinkler systems
must be tested and approved to DIN 3440 and guarantee a
flow rate of at least 2000 l/h. The response temperature must
be 95°C.
The connection to a permanently pressurised water supply
system must not be capable of being turned off. The static
pressure must be at least 2 bar. The internal diameter of the
supply pipe to the temperature-relief valve must not be less
than the valve's nominal diameter. According to DIN 4751,
Sheet 2, the temperature-relief valve must be inspected at
least once a year by an expert. If deficiencies are identified,
they must be immediately rectified.
Function
If a temperature above 95°C occurs inside the fuel auger
channel, a temperature-relief valve allows cold water to be
introduced until fuel burn-back is extinguished.
